| Value | Category | Cases | |
|---|---|---|---|
| 1 | 2 | 
                                    
                                    8%
                                 | |
| 2 | 1 | 
                                    
                                    4%
                                 | |
| 3 | 5 | 
                                    
                                    20%
                                 | |
| 4 | 17 | 
                                    
                                    68%
                                 | |
| Sysmiss | 974 |